PORIFERAN ABUNDANCE IS NEGATIVELY ASSOCIATED WITH CORAL HEALTH IN THE MESOAMERICAN REEF

2018 ◽  
Vol 70 (1) ◽  
Author(s):  
MacKenzie L. Kroll ◽  
Bobby A. Rodriguez ◽  
Andrea C. Edie ◽  
Kendra L. Phelps ◽  
Donna E. Hamilton ◽  
...  
Keyword(s):  
Coral Reef ◽  
Water Depth ◽  
Close Association ◽  
Environmental Water ◽  
Stony Corals ◽  
Close Proximity ◽  
Coral Reef Ecosystems ◽  
Yellow Band Disease ◽  
White Plague Type Ii ◽  
Coral Health

Abstract The Mesoamerican Reef is the second largest coral reef in the world and has experienced a 50% loss of coral coverage in recent decades. Due to the high biodiversity of marine life that depend on the Mesoamerican Reef, identifying drivers of coral loss is crucial. This study was designed to assess the relationship between the presence of yellow band disease (YBD) and white plague type-II (WPII) on stony corals with environmental (water depth) and biological stressors (abundance of sponges in close proximity) in the reef surrounding the Bay Islands, Honduras. Both radial and parallel transect survey techniques were used to quantify the abundance of seven sponge species within a one-meter radius of Orbicella species and Montastraea cavernsoa. The strongest predictor of coral health was the abundance of Callyspongia plicifera, followed by Svenzea zeai, in close proximity to diseased coral. A weak, but positive, correlation between poriferan abundance and the presence of disease lesions on coral was observed. However, no significant relationship of disease prevalence with water depth was observed. Additionally, no differences in the prevalence of disease lesions between four species of native stony corals were observed. These findings suggest coral species are equally susceptible to bacterial pathogens, but that close association with poriferans may increase the transmission and persistence of harmful bacteria in coral reef ecosystems.

Mexico. Condition of Coral Reef Ecosystems in Central-Southern Quintana Roo, Mexico (Part 1: Stony Corals and Algae)

2003 ◽  
Vol 496 (18) ◽  
pp. 318-337 ◽  
Author(s):  
Miguel A. Ruiz-Zarate ◽  
Roberto C. Hernandez-Landa ◽  
Carlos Gonzalez-Salas ◽  
Enrique Nunez-Lara ◽  
J. Ernesto Arias-Gonzalez
Keyword(s):  
Coral Reef ◽  
Quintana Roo ◽  
Stony Corals ◽  
Coral Reef Ecosystems

scholarly journals Effects of terrestrial runoff on the coral communities in Santiago Bay, Colima, Mexican Pacific Coast

2016 ◽  
Vol 64 (3) ◽  
Author(s):  
Marco Agustín Liñán-Cabello ◽  
Aramis Olivos-Ortiz ◽  
Sonia Quijano-Scheggia ◽  
Daniela Muñiz Anguiano ◽  
María Luisa Reséndiz-Flores ◽  
...  
Keyword(s):  
Coral Reef ◽  
Pacific Coast ◽  
Geographical Location ◽  
Coral Community ◽  
Negative Effects ◽  
Mexican Pacific ◽  
The Status ◽  
Coral Communities ◽  
Coral Reef Ecosystems ◽  
Coral Health

Coral reef ecosystems are under stress of different origins, from factors including sedimentation, fragmentation, overfishing, and tourism, depending on their geographical location, depth, and proximity to recreation areas. In this study of Juluapan Lagoon, we examined the relationship between various water-quality attributes and the status indicators of the coral community at La Boquita reef. During 2011 (12 months of sampling), six monitoring stations in the Juluapan lagoon were established in order to observe the gradient of the distribution of the physicochemical parameters: three stations on the upper part, or BI, (S4 to S6) and three more in the lower part, or BII, (S1 to S3). A control station (CS) was located in the coral reef close to the lagoon channel, and where dissolved inorganic nutrients and cellular carbon content were determined. Additionally, we considered the monitoring of three of the eight largest coral structures/headlands of this community: the first was the station closest to the channel communicating with Juluapan lagoon (C1), the second was in the intermediate region with respect to that lagoon (C2), and the third was farthest from the channel (C3). Three line intercept transects (LIT) 30 m in length and perpendicular to the coast provenance were established in each station, and the parameters indicative of the status of corals were evaluated in an area of 60 m2 on each transect (180 m2 by the station). Turbidity, evidence of fishing, signs of settling, algal coverage, abundance of fish, rate of sediment, and coral health records (as for CoralWach chart) were determined in situ and from digital photographs and videos. Considering various community status indicators used in the reef area, we could recognize a state of general deterioration, which was reflected in the loss of 17 % of coral coverage. The main anthropogenic disturbances in adjacent areas to La Boquita reef included wastewater discharges into the lagoon, tourist developments in the coastal zone, deforestation and erosion resulting from inappropriate development, and the runoff of nutrients from agricultural lands nearby the lagoon. All these significantly contributed to the nutrient-enriched waters of the lagoon, especially in summer, with negative effects on the coral community. Continued exposure to these factors, coupled with the lack of control over other anthropogenic components, has promoted the maintenance of a chronic stress state in the studied coral community. Our findings highlight the need for the development of appropriate coastal management and conservation policies for the coral reefs of the Mexican Pacific Coast.

scholarly journals Diversity, Distribution and Abundance of Scleractinian Coral in District-based Marine Protected Area Olele, Bone Bolango, Gorontalo - Indonesia

2017 ◽  
Vol 3 (4) ◽  
pp. 14
Author(s):  
Akbar Reza ◽  
Retno Peni Sancayaningsih
Keyword(s):  
Coral Reef ◽  
Protected Area ◽  
Scleractinian Coral ◽  
Life Form ◽  
Marine Protected Area ◽  
Health Assessment ◽  
Reef Slope ◽  
Mortality Index ◽  
Coral Reef Ecosystems ◽  
Coral Health

<p class="Els-Abstract-text">Despite its status as District-Based Marine Protected Area, studies pertaining coral reef biodiversity never been conducted in Olele that located in the Gulf of Tomini, biodiversity hotspot in the Coral Triangle. Hence, we aims to investigate diversity, distribution and abundance of scleractinian coral, underpinning the health of reef ecosystems. This study was conducted using Line Intercept Transect on three research stations which were divided into three main zonations, reef flat (3 m depth), upper reef slope (10 m depth) and reef slope (18 m to 20 m depth). Fifty meters long transect were laid in each zonation, thus total transect were nine. The results showed that there were 35 species of scleractinian coral from 12 families. Each zonation has a different pattern of abundance and dominant life form. Based on coral health assessment using Coral Mortality Index (CMI) and the ratio between living and dead coral coverage, coral reef ecosystems in Olele were in healthy condition with the range value 0.29 ± 0.1 and 3.60 ± 1.14. This preliminary study should be used as a basic reference for database and novel direction of conservation management strategy in District-Based Marine Protected Area Olele.</p><p><strong>Keywords: </strong>district-based marine protected area; olele; lit; sclecartinia;life form; zonation.</p>

scholarly journals THE CONDITION AND DISTRIBUTION OF STONY CORALS (Scleractinia corals) IN BANGKA WATER

2013 ◽  
Vol 5 (2) ◽  
Author(s):  
Rikoh Manogar Siringoringo ◽  
Tri Aryono Hadi
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Coral Cover ◽  
Mining Activities ◽  
Environmental Condition ◽  
Porites Lutea ◽  
Marine Life ◽  
Stony Corals ◽  
Coral Reef Ecosystems ◽  
Negative Impacts

<p>Bangka water is well known as the best tin producer in which there are many off-shore tin-mining activities conducted by both local people and tin companies. Such condition apparently brings negative impacts to marine life. Stony corals are considered as the major component of coral reef ecosystems whose condition is influenced by environmental condition. The aim of this study is to observe the general condition of coral reefs and the distribution of stony corals in Bangka Water. The study was carried out between September and November 2010 by taking 10 stations. The method used was LIT as long as 70 meters installed parallel to the coast line. The result indicates that generally the condition of coral reef was categorized as fair condition, the coral cover averaging at 47, 82 %. There were 89 species of stony corals found, divided into 13 genera. The most dominant species was Porites lutea , particularly at Station 6 by 33,3%. The prolonged turbidity mainly caused by tin-mining activities is thought to lead the coral reefs to critical condition particularly in some areas.</p> <p><strong>Keywords:</strong> stony corals, coral cover, distribution, Bangka Water.</p>

scholarly journals THE CONDITION AND DISTRIBUTION OF STONY CORALS (Scleractinia corals) IN BANGKA WATER

2013 ◽  
Vol 5 (2) ◽  
Author(s):  
Rikoh Manogar Siringoringo ◽  
Tri Aryono Hadi
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Coral Cover ◽  
Mining Activities ◽  
Environmental Condition ◽  
Porites Lutea ◽  
Marine Life ◽  
Stony Corals ◽  
Coral Reef Ecosystems ◽  
Negative Impacts

Bangka water is well known as the best tin producer in which there are many off-shore tin-mining activities conducted by both local people and tin companies. Such condition apparently brings negative impacts to marine life. Stony corals are considered as the major component of coral reef ecosystems whose condition is influenced by environmental condition. The aim of this study is to observe the general condition of coral reefs and the distribution of stony corals in Bangka Water. The study was carried out between September and November 2010 by taking 10 stations. The method used was LIT as long as 70 meters installed parallel to the coast line. The result indicates that generally the condition of coral reef was categorized as fair condition, the coral cover averaging at 47, 82 %. There were 89 species of stony corals found, divided into 13 genera. The most dominant species was Porites lutea , particularly at Station 6 by 33,3%. The prolonged turbidity mainly caused by tin-mining activities is thought to lead the coral reefs to critical condition particularly in some areas. Keywords: stony corals, coral cover, distribution, Bangka Water.

scholarly journals Coral diseases of mushroom coral (Fungiidae) in Pari Island, Kepulauan Seribu, Jakarta

2021 ◽  
Vol 944 (1) ◽  
pp. 012031
Author(s):  
B Subhan ◽  
N P Zamani ◽  
F Rahmawati ◽  
D Arafat ◽  
A Bramandito ◽  
...  
Keyword(s):  
Coral Disease ◽  
Health Condition ◽  
Yellow Band ◽  
Coral Diseases ◽  
Study Results ◽  
Coral Reef Ecosystems ◽  
Mushroom Coral ◽  
Belt Transect ◽  
Yellow Band Disease ◽  
Coral Health

Abstract Coral disease is one of the causes of the decline in the condition of coral reef ecosystems. This study aims to measure coral health based on the abundance and prevalence of coral health categories. The research was conducted in the Pari Island Cluster, Seribu Islands at four stations. The Belt Transect method with 2 × 100 meters was used to calculate coral health and a 30 m Line Intercept Transect (LIT) with three replications to determine substrate cover. The condition of coral reefs can be categorized as moderate to good based on this percentage value. The study results found five genera from the Fungiidae, namely Fungia, Ctenactis, Herpolitha, Heliofungia, and Sandalolitha. The most commonly found genus is the genus Fungia. The health condition of Fungiidae corals in Pari Island is divided into two categories, namely 35% healthy and 65% unhealthy, consisting of changes in tissue color - white (coral bleaching), changes in tissue color - not white (yellow band disease), and compromised health (damage by sedimentation). Yellow band disease is only found in the genus ˆ and is not found in other genera.

THE COMPOSITION AND DISTRIBUTION OF BENTHIC FORAMINIFERA AT CORAL REEF ECOSYSTEM IN THOUSANDS ISLAND

2013 ◽  
Vol 5 (1) ◽  
Author(s):  
Lumban Nauli Lumban Toruan ◽  
Dedi Soedharma ◽  
Kresna Tri Dewi
Keyword(s):  
Coral Reef ◽  
Human Activities ◽  
Close Association ◽  
Mesh Size ◽  
Coral Reef Ecosystem ◽  
Composition Distribution ◽  
Benthic Foraminifers ◽  
High Nutrient ◽  
Binocular Microscope ◽  
Reef Ecosystem

Composition and distribution of foraminifers are affected by human activities and have close association with coral reef ecosystem. The aims of this research were to investigate the benthic foraminifers’ composition and distribution in sediment of coral reef ecosystem. Eleven stations of Karang Bongkok, Pramuka, and Onrust Island were observed in this study. The sediments were taken from surface substrate up to 2 cm under the substrate. Samples were washed on sieve with mesh size 0,063 mm, and then dried in oven with 50°C of temperature  for two hours. After separating from the sediment, the foraminifers were laid on foraminiferal slide and indentified using binocular microscope. The highest composition of symbiont-bearing foraminiferal assemblages which associated with reef ecosystem was in East Pramuka (78.17%) and the lowest was in South Onrust (21,83%). The opportunistic type had the highest composition in South Onrust (38.67%) and the lowest was in South Karang Bongkok. In west Pramuka had the highest composition of heterotrophic type (57.17%) and the lowest was in North Onrust (11.33%). Onrust Island was dominated by opportunistic type, indicating high nutrient. The highest amount of foraminifers’ taxa was found in Karang Bongkok with good coral reef coverage, while the lowest in Onrust facing with Jakarta Bay. Keywords: composition, distribution, benthic foraminifers, coral reef.

scholarly journals Tidal variability of nutrients in a coastal coral reef system influenced by groundwater

2018 ◽  
Vol 15 (4) ◽  
pp. 997-1009 ◽  
Author(s):  
Guizhi Wang ◽  
Shuling Wang ◽  
Zhangyong Wang ◽  
Wenping Jing ◽  
Yi Xu ◽  
...  
Keyword(s):  
Coral Reef ◽  
Water Column ◽  
Water Depth ◽  
Neap Tide ◽  
Groundwater Discharge ◽  
Spring Tide ◽  
Biological Processes ◽  
Reef System ◽  
Nitrite Nitrate ◽  
Coral Reef System

Abstract. To investigate variation in nitrite, nitrate, phosphate, and silicate in a spring–neap tide in a coral reef system influenced by groundwater discharge, we carried out a time-series observation of these nutrients and 228Ra, a tracer of groundwater discharge, in the Luhuitou fringing reef at Sanya Bay in the South China Sea. The maximum 228Ra, 45.3 dpm 100 L−1, appeared at low tide and the minimum, 14.0 dpm 100 L−1, appeared during a flood tide in the spring tide. The activity of 228Ra was significantly correlated with water depth and salinity in the spring–neap tide, reflecting the tidal-pumping feature of groundwater discharge. Concentrations of all nutrients exhibited strong diurnal variation, with a maximum in the amplitude of the diel change for nitrite, nitrate, phosphate, and silicate in the spring tide of 0.46, 1.54, 0.12, and 2.68 µM, respectively. Nitrate and phosphate were negatively correlated with water depth during the spring tide but showed no correlation during the neap tide. Nitrite was positively correlated with water depth in the spring and neap tide due to mixing of nitrite-depleted groundwater and nitrite-rich offshore seawater. They were also significantly correlated with salinity (R2  ≥  0.9 and P < 0.05) at the ebb flow of the spring tide, negative for nitrate and phosphate and positive for nitrite, indicating the mixing of nitrite-depleted, nitrate- and phosphate-rich less saline groundwater and nitrite-rich, nitrate- and phosphate-depleted saline offshore seawater. We quantified variation in oxidized nitrogen (NOx) and phosphate contributed by biological processes based on deviations from mixing lines of these nutrients. During both the spring and neap tide biologically contributed NOx and phosphate were significantly correlated with regression slopes of 4.60 (R2  =  0.16) in the spring tide and 13.4 (R2  =  0.75) in the neap tide, similar to the composition of these nutrients in the water column, 5.43 (R2  =  0.27) and 14.2 (R2  =  0.76), respectively. This similarity indicates that the composition of nutrients in the water column of the reef system was closely related with biological processes during both tidal periods, but the biological influence appeared to be less dominant, as inferred from the less significant correlations (R2  =  0.16) during the spring tide when groundwater discharge was more prominent. Thus, the variability of nutrients in the coral reef system was regulated mainly by biological uptake and release in a spring–neap tide and impacted by mixing of tidally driven groundwater and offshore seawater during spring tide.

Impacts of human activities on coral reef ecosystems of southern Taiwan: A long-term study

2012 ◽  
Vol 64 (6) ◽  
pp. 1129-1135 ◽  
Author(s):  
Pi-Jen Liu ◽  
Pei-Jie Meng ◽  
Li-Lian Liu ◽  
Jih-Terng Wang ◽  
Ming-Yih Leu
Keyword(s):  
Coral Reef ◽  
Human Activities ◽  
Term Study ◽  
Long Term Study ◽  
Coral Reef Ecosystems ◽  
Southern Taiwan
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